Chillum experiences a relatively mild climate with distinct seasonal variations. Winters are chilly, with average temperatures ranging from around 2-3°C in January and February, often dipping below freezing. As spring approaches, temperatures gradually warm up, reaching averages of around 9-13°C by March and April. Summer months bring warmer conditions, with July and August averaging around 26°C, although highs can occasionally reach the mid-30s. Autumn sees a return to cooler temperatures, with November and December averaging around 8-9°C, but still experiencing occasional mild days.